16-BIT CONSTANT CURRENT LED SINK DRIVER
DESCRIPTION
The UTC L16B45A is designed for LED displays. UTC L16B45A contains a serial buffer and data latches which convert serial input data into parallel output format. At UTC L16B45A output stage, sixteen regulated current ports are designed to provide uniform and constant current sinks for driving LEDs within a large range of Vf variations. UTC L16B45A provides users with great flexibility and device performance while using UTC L16B45A in their system design for LED display applications, e.g. LED panels. Users may adjust the output current from 3mA to 45mA through an external resistor, Rext, which gives users flexibility in controlling the light intensity of LEDs. UTC L16B45A guarantees to endure maximum 17V at the output port. The high clock frequency, 25MHz, also satisfies the system requirements of high volume data transmission.
FEATURES
* 16 constant-current output channels
* Constant output current invariant to load voltage change
Constant output current range:
3~45mA @ VDD=5V
3~30mA @ VDD=3.3V
* Excellent output current accuracy: between channels: ±2.5% (max.), between ICs: ±3.0% (max.)
* Output current adjusted through an external resistor
* Fast response of output current, OE (min.): 70ns @ VDD=3.3V
* 25MHz clock frequency
* Schmitt trigger input
* 3.3V/5V supply voltage
* Halogen Free
